关键词: 飞行器控制、导航技术 , 捷联惯导 , 初始对准 , 遗传算法 , 卡尔曼滤波

Abstract: In order to improve the precision oi initial alignment of strapdown inertial guidance system, extractive alignment method was presented by using genetic algorithm on the basis of rough alignment. The main manipulations of the algorithm were carefully selected for simulation according to the charac?teristics of initial alignment, and the simulation results were compared with the results from Kalman filtering. The comparative results show that the global searching ability of genetic algorithm used for initial missile alignment can greatly speed up the process to make the missile system react quickly to various situations, but the limit ox its local searching ability makes the algorithm less effective in some phases, thus it should be used together with some other algorithms with excellent local searching abili-ty in order to optimize the whole system.

Key words: control and navigation for flight vehicle , strapdown inertial guidance , initial alignment , genetic algorithm , Kalman filter